Quantum Fisher information in a strange metal
arXiv:2403.12779 · doi:10.1038/s41567-026-03298-0
Abstract
A strange metal is an exotic state of correlated quantum matter; intensive efforts are ongoing to decipher its nature. Here we explore whether the quantum Fisher information (QFI), a concept from quantum metrology, can provide new insight. We use inelastic neutron scattering and quantum Monte Carlo simulations to study a Kondo destruction quantum critical point, where strange metallicity is associated with fluctuations beyond a Landau order parameter. We find that the QFI probed away from magnetic Bragg peaks, where the effect of magnetic ordering is minimized, increases strongly and without a characteristic scale as the strange metal forms with decreasing temperature, evidencing its unusual entanglement properties. Our work opens a new direction for studies across strange metal platforms.
arXiv comment17 pages, 4 figures
References in corpus (38)
- Locally critical quantum phase transitions in strongly correlated metals
- Onset of antiferromagnetism in heavy fermion metals
- Fisher information and multiparticle entanglement
- Multipartite entanglement and high precision metrology
- Hall-effect evolution across a heavy-fermion quantum critical point
- Fractionalized Fermi liquids
- Measuring multipartite entanglement via dynamic susceptibilities
- MATBG as Topological Heavy Fermion: I. Exact Mapping and Correlated Insulators
- Interplay of disorder and spin fluctuations in the resistivity near a quantum critical point
- Quantum phases driven by strong correlations
- Destruction of Kondo effect in cubic heavy fermion compound Ce3Pd20Si6
- Flat bands, strange metals, and the Kondo effect
- Witnessing entanglement in quantum magnets using neutron scattering
- Witnessing quantum criticality and entanglement in the triangular antiferromagnet KYbSe
- Progress on stochastic analytic continuation of quantum Monte Carlo data
- Emulating heavy fermions in twisted trilayer graphene
- Singular charge fluctuations at a magnetic quantum critical point
- Kondo lattice model in magic-angle twisted bilayer graphene
- Absolute cross-section normalization of magnetic neutron scattering data
- Shot noise in a strange metal
- Sequential localization of a complex electron fluid
- Zooming in on heavy fermions in Kondo lattice models
- Kondo breakdown in a spin-1/2 chain of adatoms on a Dirac semimetal
- Quantum phase transition in a two-dimensional Kondo-Heisenberg model: a Schwinger-boson large-N approach
- Tunable non-Fermi liquid phase from coupling to two-level systems
- Witnessing Light-Driven Entanglement using Time-Resolved Resonant Inelastic X-Ray Scattering
- Long-range entanglement near a Kondo-destruction quantum critical point
- Multipartite entanglement in the 1-D spin- Heisenberg Antiferromagnet
- Pristine quantum criticality in a Kondo semimetal
- Dynamical scaling of charge and spin responses at a Kondo destruction quantum critical point
- Incommensurate short-range multipolar order parameter of phase II in Ce3Pd20Si6
- Evolution of the propagation vector of antiferroquadrupolar phases in Ce3Pd20Si6 with magnetic field
- Amplified multipartite entanglement witnessed in a quantum critical metal
- Quantum Criticality Enabled by Intertwined Degrees of Freedom
- Cascade of magnetic-field-driven quantum phase transitions in Ce3Pd20Si6
- Emergent Topological Semimetal
- Quantum impurity model for two-stage multipolar ordering and Fermi surface reconstruction
- Quantum Fisher information in a strange metal